2002 Florida -- dozens of school districts received no state grades for their 2002 scores because of a “programming error” at the DOE. One Montessori school never received scores because NCS Pearson claimed not to have received the tests.

2007-2011 Mississippi – subcontractor programs correct answer as incorrect resulting in erroneous results for almost four years during which time 126 students flunked the exam due to that wrongly scored item. Auditors criticized Pearson’s quality control checks, and the firm offered $600,000 in scholarships as compensation

2008-2009 Arkansas -- first graders forced to retake exam because real test used for practice

2009-2010 Wyoming – Pearson’s new computer adaptive PAWS flops; state declares company in “complete default of the contract;” $5.1 million fine accepted after negotiations but not pursued by state governor